Basement waterproof foundation pit structure and construction method thereof

Abstract

The invention relates to the field of building underground construction, in particular to a basement waterproof foundation pit structure and a construction method thereof. The basement waterproof foundation pit structure comprises a basement body, a foundation pit enclosure wall, a basement reinforcing impermeable layer, a plurality of stand column piles and a plurality of engineering piles, wherein the multiple stand column piles and the multiple engineering piles are located in a foundation pit. Each stand column pile is connected with the corresponding engineering pile to form a column pile, the engineering piles in the column piles are arranged below the stand column piles, the bottoms of the engineering piles are embedded into a water-insulating layer or a rock layer, and the tops of the stand column piles are flush with the elevation of the top of the foundation pit; the foundation pit enclosure wall is arranged on the side surface of the basement body, and a basement bottom plate is arranged at the bottom of the basement body; the foundation pit enclosure wall is an underground continuous wall formed by a plurality of splice-type prefabricated wallboards in a mutual splicing mode; and the basement reinforcing impermeable layer is arranged below the basement bottom plate, and the side surface of the basement reinforcing impermeable layer is connected with the foundation pit enclosure wall to form a structure, wherein the cross section of the structure is in an H shape.

Description

technical field [0001] The invention relates to the field of building underground engineering, in particular to a basement waterproof foundation pit structure and a construction method thereof. Background technique [0002] At present, similar to the geological characteristics of the binary structure of Wuhan I-level terraces, the upper part is the fine-grained sedimentary layer of floodplain facies, the lower part is the coarse-grained sedimentary layer of riverbed facies, and the bottom layer is the geological structure of rock strata. The following methods are often used for layer pumping and settlement: 1. The anti-seepage curtain is constructed to the rock layer or other clay water-resisting layers, and other supporting structures such as cast-in-place piles are installed in front of the curtain according to the design requirements; 2. The anti-seepage and supporting structures are integrated Cast-in-place underground diaphragm wall, the depth of the wall also reaches t...

AI Technical Summary

Problems solved by technology

This construction method has the following disadvantages: 1. The depth of the diaphragm wall is large, and the construction cost is high. On the basis of meeting the anti-uplift and stability requirements of the pit bottom, the underground diaphragm wall generally needs to exceed the depth by 2 to 4 times; 2. The pouring wall is relatively deep, and it is difficult to control the verticality, and the pouring quality is difficult to guarantee when the depth of the groove is large, so it is easy to form weak parts at the joints of adjacent underground diaphragm walls; causing hidden dangers of water leakage, causing the surrounding ground to collapse and threatening Pit stability

Images